Heat-exchange device



Fan. 22 1924.

T. J. KE HOE HEAT EXCHANGE DEVICE Filed Dec. 4, 1915 @313 I attorney Patented Jan. 22, 1924.

tlhiiiT STATS THOMAS J'. KEHOE, 0J3 TOLEDO, OHIO, ASSIGNOB TO THE WILLYS-OVERLAND COMPANY,

OF TOLEDO, OHIO,

HEAT-EXCHANGE DEVICE.

Application filed December 4, 1915. Serial No. 64,969.

To all whom it may concern:

Be it known that I, THOMAS J. Knnon, a citizen of the United States of America, residing at Toledo, Lucas County, Ohio, have invented new and useful Heat-Exchange Devices, of which the following is a specification.

This invention relates to heat exchange devices and particularly to improvements in radiator cores for use in connection with automobiles. The principal object of my invgntion is to provide an improved radiator core construction, which will provide a large amount of radiation surface with theuse of a small. amount of metal, and wliichwill secure a very effective cooling of the water in the circulation system in a radiator of small dimension. A further object of my invention is to provide a radiator so. constructed that it will be strong and rigid and readily accessible in case repairs are necessary, while at the same time economical to produce because the amount of metal and solder necessary for its production is lessened.

Further objects, and objects relating to economies of construction and details of manufacture. will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. My invention is clearly defined and pointed out in the appended claims.

A structure constituting a preferred embodiment of my invention is illustrated in the accompanying drawing forming a part of this specification, in which:

Fig. 1 is a fragmentary perspective view of a device in accordance with the inventio herein; I

Fig. 2 is a transverse vertical section of a portion of the device of Fig. 1;

Fig. 3 is a section on the line III-III, Fig. 2;

Fig. 4 is a fragmentary perspective view of one of the elements of half tube form.

This invention comprises an improved radiator core made up of a pluralityof units assembled together, so as to provide vertically extending water passages, provided radiator core.

with laterally extending arms or branches, the units being so assembled and so co-acting together-as to form horizontal transverse air cells or passages, the Walls of said air cells orpassages being formed by the parts of the vertical water passages and laterally extending fins so as to provide as large a surface as possible exposed at one side to the hot water of the circulation system and on the other side to the cool air passing through the transverse horizontal air passages of the This unit comprises a metal striphaving the parallel edge flanges 2 2 and the central portion 1 between said flanges, which is depressed out of the plane of said flanges, so

that, when two of said units areassembled together with their side flanges in engagement, a vertical water tube or passage 4 will be' formed by the opposed depressions 1 in said strip. The strip is creased at intervals to provide the upwardly extending fins 3 the metal being folded upwardly and then back to the plane of the main body of the strip so as to form hollow laterally extending fins '3, which communicate with the main water passage 4. Portions of said laterally extending fins are pressed together, so as to close the ends thereof.

Grooves 5 are provided in the walls of the water passages 4, intermediate the laterally extending fins 3. so as to increase the radiation surface of said water tube, as clearly ap a manner that the outer edge of each of said laterally extending fins 3 abuts the next adjacent water tube or passage at the base of one of the; laterally extending fins 3 on said tube or passage, so that the horizontal air passages extending transversely through the radiator have their side walls formed by the surface of the water tube or passage between the laterally extending fins, by one of the laterally extending fins extending from saidwater tube or passage, and by a laterally and upwardly extending fin on the next adjacent tube or passage. Since these fins extendlaterally from the water tubes at an angle of approximately 60 and are approximately equal in length to the-distance between the fins on each tube, an air passage or cell of equilateral triangular shape will be formed. This serves to accurately position the tubesrelativeto each other and these units-may be assembled as shown-in Fig. 2. They are held in such as sembled position and the ends are dipped in solder so as to close the seams thereof, thus forming a'complete radiator core, consisting of a plurality of water tubes or'passages, having 'the laterally extending hollow fins?) and the-grooves 5. The water of the circulationsystem flowing from the upper'header to the'lower header will fill said water tubes or passages, and the laterally extending fins thereof, so that all the walls of the horizontal triangular air passageswill befilled with water from'the circulation system andexposed to the cooling effect of the current of air, which passes through said cells or air passages' I have provided a radiator core construction which may be accurately made on a large scale and in whicha large amount of radiaton surfaceis provided with a compara tively small weight of metal so as to Provide as much radiation as possible for the weight of metal used. Furthermore, the amount of solder applied is decreased as only the ends of the core'need to be dipped in the solder, and these ends are so constructed'that they do not absorb as much solder as in some other constructions. Furthermore, the wa ter tubes can easily be stamped from ablank, by dies and can 'bequickly andconveniently Formed into tubes and assembled together to formthe radiator core. 1

lhavefound that the particular embodiment ofmy'invention, which I have herein described, is"d'esirable from many standpoints,'but'I am aware thatit inay'be varied considerably without departing from the spirit of my invention; and, therefore, I desire-"to claim my invention-bothbroadly and specifically as indicated by the appended claims; I

VVha t is claimed'and it is desired to secure by Letters Patent is I 1. Ina device of the class described, the combination ofwater tubes provided with hollow fins extending laterally and upwardly therefrom. atan' angle'f of' approximately 60, the width of-said tins being apptoxi mately equal to the distance between successive fins, said tubes being provided with outwardly swelled portions between successive fins and being assembled together with the outer edge of each of said laterally extending fins engaging the base of a laterally extending fin on the next adjacent water tube.

In. a device or the class described, the combination of a plurality of vertically extending water tubes, provided with laterally extending fins the fins of one tube be ing disposed at an angle to the adjacent fins of the next succeeding tube, said tubes being assembled together with the outer edges of said fins engaging the next adjacent tube, to form a plurality of horizontally extending air passages o't'triangular cross section.

3. In a; device of'thc classdeseribed, the combination of a plurality of vertically extending water tubes, laterally extending fins extending from the body of said tube at an angle of approximately 60, said tubes being assembled together with the outer edges of said laterally extending fins, engaging the base of a laterally extending fin on the next adjacent water tube. a

v 4. In a de'viceot theclass described, the combination of a plurality of spaced water tubes each formed of a pair of metal strips, each of said strips having outwardly folded portions forming fins extending diagonally across the space-between adjacent tubes, therebyforming substantially triangular air passages.-

5; In a device of the class described, the combination of a plurality of water tube sections provided with fins inclined with respect to thebody of the sections, said sectionsbeing assembled so that the fins of one section make: acute angles'with those of the adjacent section.

6. In a device of the class described, the combination of a plurality 0t tubes provided witlr fins inclined with respect to the body of the tubes and having grooves formed uponthe body betweenthe fins, the tubes being adapted to be assembled in such a manner that the inclined fins upon one section -cooperate with the corresponding fins on the adjacent section to, form air passages of triangular cross section.

7. A; plurality of water tubes each comprising abody having rlivergeiitly arranged fins extending from opposite sides thereof,

certain of the fins on each side'of the intermediate tubes being interposed between the fins carriedby thene'xt succeeding tube.

8. In a device of the class described, the combination of a" plurality of water tubes each formed ofa pair ot'metal strips'jassembled together with side flanges engaging each other, and with the portion between said flangesdepre'ssed and struck up to form laterally extending fins, the fins of one tube being disposed at an angle to the adjacent fins oi the next succeeding tube and interposed therebetween.

9. In a device of the class described, the

5 combination of plurality of spaced water tube sections, each provided With fins inclined with respect to the main portion of the tube and extending across the intervening space, the fins of each section being interposed between the fins of adjacent sec- 19 tions and inclined relative thereto. In witness whereof I afiix my signature.

THOMAS J. KEHOE 

